#
#  Compute the average of all numbers entered by the user until the user
#  enters 0.
#

count = 0.0
sum = 0.0
value = input("Enter a value (0 to quit): ")

#
#  Loop until the user enters 0.
#
while value != 0:
  sum = sum + value
  count = count + 1
  value = input("Enter another value (0 to quit): ")

#
#  If the user has entered some values, display the average.  Otherwise display
#  an appropriate message.
#
if count != 0:
  avg = sum / count
  print "The average of those numbers is",avg
else:
  print "No values entered."